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Subjectyam driver null deref
--- linux-2.6.5/drivers/net/hamradio/yam.c~	2004-04-16 22:24:00.000000000 +0100
+++ linux-2.6.5/drivers/net/hamradio/yam.c 2004-04-16 22:24:32.000000000 +0100
@@ -919,9 +919,12 @@
static int yam_close(struct net_device *dev)
{
struct sk_buff *skb;
- struct yam_port *yp = (struct yam_port *) dev->priv;
+ struct yam_port *yp;

- if (!dev || !yp)
+ if (!dev)
+ return -EINVAL;
+ yp = dev->priv;
+ if (!yp)
return -EINVAL;
/*
* disable interrupts
-
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